Precise determination of manganese in steel by dc glow discharge optical emission spectrometry associated with voltage modulation technique

Kazuaki Wagatsuma, Kenji Kodama, Hyunkook Park

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

A voltage modulation technique was applied for the precise and accurate determination of manganese in steels in dc glow discharge optical emission spectrometry. Emission signals from the glow discharge plasma are modulated by a cyclic variation of the discharge voltage so that only the desired signals can be detected at very low noise levels by using a lock-in amplifier. Mn determination in low-alloyed steels was performed to estimate the repeatability of the analytical result. For each measurement, the relative standard deviation (R.S.D.) of the intensities of the Mn I 403.08-nm line was ca 0.1% when a steel sample containing 0.329mass% Mn was employed. Averaging all analytical values, which are obtained in various discharge conditions, yields statistical information on the precision and accuracy of the analytical values obtained. The relative error from the recommended value is calculated to be 0.5%. The R.S.D. over the analytical values is 1.5%, representing the overall analytical performance of this technique.

Original languageEnglish
Pages (from-to)257-263
Number of pages7
JournalAnalytica Chimica Acta
Volume502
Issue number2
DOIs
Publication statusPublished - 2004 Jan 30

Keywords

  • Glow discharge optical emission spectrometry
  • Manganese
  • Precision
  • Repeatability
  • Steel
  • Voltage modulation

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy

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